Idea wanted; block disk on network (SC101T)

Guys, who are a type of curiosity loving,
I'm toy'ing an idea to have filesys on cheap SAN devices. The
block block is Netgear SC101T and/or Zetera NBOD. (Yes,
I'm aware of what OS insides in them; grab the firmware and
run strings on them). Although the UDP-SAN wire protocol is
not disclosed (yet), Linux camp already has a working program
to use SC101 SAN as "network block device." I think it's _kool_
and want to practice the NetBSD way. My Q is;
Q. how can I build block IO device driver "plumb'ing" UDP-SAN
data pipe? I assume puffs/refuse would be more/less useful
naively.
Toru Nishimura / ALKYL Technology